Ever try to make sense of a medical bill, with its co-payments, cost-sharing, and government or insurance-company reimbursements that haven’t been paid yet? Hospital stays with multiple doctors and lab tests make billing even messier. These layers of complexity contribute to errors and confusion that can damage Americans’ credit ratings. Consumers “incur medical debts in collection without certainty about what they owe, to whom, when, or for what,” the federal Consumer Financial Protection Bureau (CFPB) reports. When a hospital or physician hasn’t been paid, they may, after trying to resolve the issue in-house, pass the unpaid bill to one or a series of collection agencies. Yet nearly one in four of the complaints consumers have made to CFPB about medica…